We have released an update for InDesign CC2019 (v 14.0.1) which contains fixes for some key issues. If you are not already on 14.0.1 (build 209), then we recommend you to update to latest version.

If you still face this issue even after updating, please send the following information to santalwa@adobe.com :

Reproducible Steps –
• What were you doing when the issue was observed in InDesign?
• Error snapshot or video recording of the issue.
• Is the issue related to a specific document(s)/asset(s)? If yes, can you please share the document(s)/asset(s) with us? Please package the entire document(To package the document, Go to File → Package)

We have released an update for InDesign CC2019 (v 14.0.1) which contains fixes for some key issues. If you are not already on 14.0.1 (build 209), then we recommend you to update to latest version.

If you still face this issue even after updating, please send the following information to santalwa@adobe.com :

Reproducible Steps –
• What were you doing when the issue was observed in InDesign?
• Error snapshot or video recording of the issue.
• Is the issue related to a specific document(s)/asset(s)? If yes, can you please share the document(s)/asset(s) with us? Please package the entire document(To package the document, Go to File -> Package)

I have the same issue today. I need to apply masters A, B and C throughout a 250-page single file. The masters at the moment seem to be locked. Every time I click to 'apply a master to page' it does not allow me to change. The other options are showed in lighter grey.

That also happened in find/search where I want to select 'document' rather than 'story' but the software won't allow me to change that too.